正在同步电影信息
InthewaningdaysofWWI,aU.S."MysteryShip,"setssailforthecoastofSpaintowingasubmarine.TheirmissionistofindandsinkaU-boatthathasbeenespeciallyeffectiveinattackingAlliedshipping.Posingasaharmlessschooner,themysteryshipisinfactfittedwithaformidableguncapableofsinkingaU-boat.StoppingintheCanaryIslandstorefuel,thecrewinteractswithlocalsinvolvedwithGermans,andwithGermansthemselves,includingthesisteroftheU-Boatcommander,whoislurkingoffshorewaitingforthecomingbattle.
